CUSTOMER CONCERN Customer states the 12-volt charging system is inoperative after high-voltage battery replacement and DTC P0A94 is stored. CAUSE Fuse 3 and the power supply at terminal 2 of the DC-DC converter four-pin black connector tested correctly, confirming an internal DC-DC converter fault. CORRECTION Remove and replace DC-DC converter. Clear DTC P0A94 and verify 12-volt charging operation.

CUSTOMER CONCERN Customer states the IMA and check-engine lights are on with P0A7F, P1570 and P1435. CAUSE Battery-block testing confirmed high-voltage IMA battery deterioration. CORRECTION Remove and replace high-voltage IMA battery pack. Program applicable control-module software and clear DTCs.